Improvement in grinding ledger and fly-blades, planer-knives



y To all 'whom/it may concern@` y i PBe it known tlzatI, CHARLES Hanny, ofiddeford,

-in the county of` York and State of Maine,.have inticle to be ground.

l `ing-wheel.

knifefor grinding. f i

r f liinird ltere donantes.' H ARDY, orY n rnnnro n n, n A inn.

t l Letters Patient 1Y0. 104,584@ dated June 21, 1870.

, "rMPRovEMENT iN GRINDINGLEDGER AND :FLY-BLADES, PANBR-Kzvivns, are;

. ThtSchedule referred toiuthse Letters Patent and mal-ring part of the same.

vented a newT and `usefulMaehinefor GrindingLedgcr and Fly-Blades and Planer-Knives', and TrningDressa i er-Rolls, 85o.; andI hereby declarethe following to be` a full, clear, and exact description thereof, which will "enable others to make and'use my invention, reference being'hadto the accompanying drawing 'forming part of` this specification, in which-' y i Figure ljis a top plan. i

,l Figure 2 a side elevation ot' thedevice for adj ust-.1

ing to the grinding-wheel a planer-knife, or other `ar- Figure `3 `is a side elevation oi a portion-of the grind- Fignre 4 isan end view of the same.

`A show stne `picccity `which ai@ monomer/nic H grinding-wheel' areregulated bythe spiral, andby which said machineis connected with the spiral.

, V .B` is an endviewof the method of securing aplaner- {Let-ters Patent of the `States have already been granted to` me for a machine forgrinding the card- 7 `teeth of ending-cylinders, dated February 5, 1861;

also, for a machine for grinding topf cards', workers, &c., said patent being dated April 16,1867. In the present application, and in tlietwo patents above named, there are certain parts that are common to all, which parts I do not, ofcourse, now claim ;Y such being a shaft,

` provided with a helical groove 1 thereon; a grindingwheel, havinga, reciprocating rectilinear' motion, caused f .by thesaid helix or groove,and on atubnlar shaft suri j'ronnding the-shaft havingthe helix.

My present invention consistsi First, o f avdevice or devices for holding a planingmachineknife while being ground, and for adjusting the same `to the wheel by which itis ground.

Seeondfofan application of means for grinding ledger oryfblades, and for truin'g dresser-rolls.

Third, of an improvement inthe method of connecting the grinding-wheel with the spirally-grooved shaft, 4by which a better operation and greatergdurablity are J secured.

In the 'grinding of ledger-blades and planer-knives,

" i and in truing dresser-rolls, 85e., it is, in the first place,

l vry'important that the same" should be ground with perfect evennessrand uniformity. This is vespecially the ease withledger-blades'andplancrknives, as maybe seen from the nature of the` use to. which they are applied.

that they were being ground true, except by sighting,

.of the thumb-screws Z.

parting motion to 'the cylinderfandyrollers is similar to that in those machines on which Letters Patepthave 4 been granted to me, and-which isnot herein claimed. 'lhemethod oi' attaching planer-knives to my machine, for the purpose of grinding, may bc thus described:

Upon the top of the citherside, are bolted the plates a, with the dovetailed piece 71 rising therefrom. Moving upon the piece I) the sliding carriage c, with a dovetailcdgroove in the, bottom side thereof', to it over the track or piece b. Theearriage c is moved backward and forward over the track by'means of tliescrcw and thumb-piece 1l. Set in the carriages c, in the boxes f on shafts h, is a plate of metal, c, extending from side to side of the machine. This plate e has the groove i extending the as shown at B, and, on the bottom side thereof, has the strengthening piece j,to make the carrier rm'aud rigid. Set on thc ends of the trunnions it are the lcversk, having set-screws Z to slide in the slots of' the curved'pieccs an. By means of the levers L any desiredineiination.maybe given to the plate c, as illustrated in g. 2, and, when they desired position is attained, the plate may then bc held securely 'by means In the drawingg shows a planer-knife, attached vtol the plate e by' means of bolts and nuts n, the said bolts havingheads which vfit into the enlargement i of the slot in c. These bolts fit in the slots o ofthe planer-knife, and are then secured by thc nuts n, as already described. K It will thus be seen that the planer-knife is secured to the plate e in a manner similar to that, as far as the knife itself is concerned, by which it is secured in the machine for use. It is thus prevented from bending or springing, the table or rest e being first constructed'pcrfectly true. vThe cect of this method of grinding the knife is to slightly concave the edge thereof, as illustrated at B, thus very much diminishing the wear of the knife by theproeess of grinding. From the method employed toadjust the knife, it will he seen'that it can be very accurately adjusted, and very evenly and uniformly ground. p represents a dresser-roll, which can also be trucd in my'machine, when the same has bcen'sprung or WON] anni Qtililw.-

frame of the machine, upon entire length, which groove is widened at the bottom, I

rlhe roll is first placed, by means of its own journal or shaft q, in the box or bearing r. A motion is im parted to the roll by the pulley s, from which a hand extends to a fixed pulley on the motor-shaft of the machine. The position of the roll, relative to the grinding-wheel t, is regulated by the sliding box or bearing lr, adjusted by the thumb-screw u.

Great difficulty has been experienced hitherto in re-v pairing dresser-rolls after the saine have become sprung and creased by use, and in preserving the roll perfectly true and even. The truing has hitherto been done by turning them oli` in a lathe, and then smoothing them. This Very rapidly Wastes and wears away the material or stock of the roll, while, in my machine, no more is taken oft' than is absolutely necessary for the purpose of truing. This is evident from the method employed in my machine, under which the roll lasts much longer.

The same remarks apply to ledger and fly-blades, where a slight variation in the edges of the spiral knives, on the face or surface of the ledger-blade or roll, might c'ect serious injury to the goods which are subjected to them. The threads might be cut as the.

cloth passes between the roll and blade. This is plain, as, on account of the proximity of the roll-and blade, i. c., the ily or ledger-blades, the cloth passing between them might be cut, and the threads injured by the knives.

Fig. 4 illustrates my improvement in the method of managing the grinding-wheel, different from that in the patent above referred to.

An edge view of one portion of the wheel is shown iu lig. 3, in which is seen the tace-part e, and the hub or center-part w, which surrounds the tubular shaft x.

From 'w rises the projection y, having a socket to receive the stock s. which has, at the end, the bifuruntell 2 'cation or curved part a. This curved part fits into the helical grooves on the shaft b'.

Upon the stock z, just above the' bifurcation a', I place the loose steel ring c', which is ot' great value in the operation of the grinding-wheel, relieving, as it does', the guide z a from binding, wear, and friction against the slot of the tubular cylinder, and preventing any obstacle to the free reciprocating motion of y'the grinding-wheel.

The face-plate d is bolted or screwed to the part y, as shown in figs. 3 and 4.

Formerly, the curved or crescent piece was fitted with a socket, and the guide turned on the lower end ofthe stock z,.but, with this construction, the bifurcated part worked loose, and, becoming thus, had a tendency to bind in the screw or spirahand injure the same, and also impede the freedom of motion of the grinding-wheel. With the present arrangement, the friction of the stock s against the edges of the slot in the shell, or tubular cylinder, is much reduced, and the durability of the guide, as well as its freedom of. v operation, is much better attained.

What I claim as my invention, and desire to secure by Letters4 Patent, is-

vThe improved devices for securing, adjusting, and grinding planer-knives, as hereinbefore described, consisting of the grinder t, tubular shaft x, and shaft b', in combination with the plate c, withslots i, bolts n, carriage c, thumb-screws d, slotted guide mf, and lever 7.', as shown and set foith.

2. The construction of the guide s a', figs. 3 and 4, and the ring c' on the stocky/J, as set forth.

CHARLES HARDY.

Witnesses Geo. W. WATSON, G. PORTER HARDY. 

